Malware Analysis Report

2024-11-15 07:18

Sample ID 220626-3kqz1aehaq
Target 35a124707d778d78543bf3bce873defdad0934144368a9c627bfea3583afbd9a
SHA256 35a124707d778d78543bf3bce873defdad0934144368a9c627bfea3583afbd9a
Tags
kutaki keylogger stealer
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V6

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

35a124707d778d78543bf3bce873defdad0934144368a9c627bfea3583afbd9a

Threat Level: Known bad

The file 35a124707d778d78543bf3bce873defdad0934144368a9c627bfea3583afbd9a was found to be: Known bad.

Malicious Activity Summary

kutaki keylogger stealer

Kutaki family

Kutaki

Kutaki Executable

Executes dropped EXE

Drops startup file

Loads dropped DLL

Maps connected drives based on registry

Enumerates physical storage devices

Suspicious use of SetWindowsHookEx

Suspicious use of WriteProcessMemory

Modifies Internet Explorer settings

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2022-06-26 23:34

Signatures

Kutaki Executable

Description Indicator Process Target
N/A N/A N/A N/A

Kutaki family

kutaki

Analysis: behavioral1

Detonation Overview

Submitted

2022-06-26 23:34

Reported

2022-06-26 23:40

Platform

win7-20220414-en

Max time kernel

149s

Max time network

46s

Command Line

"C:\Users\Admin\AppData\Local\Temp\35a124707d778d78543bf3bce873defdad0934144368a9c627bfea3583afbd9a.exe"

Signatures

Kutaki

stealer keylogger kutaki

Kutaki Executable

Description Indicator Process Target
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\xrjxeech.exe N/A

Drops startup file

Description Indicator Process Target
File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\xrjxeech.exe C:\Users\Admin\AppData\Local\Temp\35a124707d778d78543bf3bce873defdad0934144368a9c627bfea3583afbd9a.exe N/A
File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\xrjxeech.exe C:\Users\Admin\AppData\Local\Temp\35a124707d778d78543bf3bce873defdad0934144368a9c627bfea3583afbd9a.exe N/A

Maps connected drives based on registry

Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\xrjxeech.exe N/A
Key value queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\services\Disk\Enum\0 C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\xrjxeech.exe N/A

Enumerates physical storage devices

Modifies Internet Explorer settings

adware spyware
Description Indicator Process Target
Key created \REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Internet Explorer\Main C:\Users\Admin\AppData\Local\Temp\35a124707d778d78543bf3bce873defdad0934144368a9c627bfea3583afbd9a.exe N/A
Key created \REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Internet Explorer\Main C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\xrjxeech.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1376 wrote to memory of 1760 N/A C:\Users\Admin\AppData\Local\Temp\35a124707d778d78543bf3bce873defdad0934144368a9c627bfea3583afbd9a.exe C:\Windows\SysWOW64\cmd.exe
PID 1376 wrote to memory of 1760 N/A C:\Users\Admin\AppData\Local\Temp\35a124707d778d78543bf3bce873defdad0934144368a9c627bfea3583afbd9a.exe C:\Windows\SysWOW64\cmd.exe
PID 1376 wrote to memory of 1760 N/A C:\Users\Admin\AppData\Local\Temp\35a124707d778d78543bf3bce873defdad0934144368a9c627bfea3583afbd9a.exe C:\Windows\SysWOW64\cmd.exe
PID 1376 wrote to memory of 1760 N/A C:\Users\Admin\AppData\Local\Temp\35a124707d778d78543bf3bce873defdad0934144368a9c627bfea3583afbd9a.exe C:\Windows\SysWOW64\cmd.exe
PID 1376 wrote to memory of 1984 N/A C:\Users\Admin\AppData\Local\Temp\35a124707d778d78543bf3bce873defdad0934144368a9c627bfea3583afbd9a.exe C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\xrjxeech.exe
PID 1376 wrote to memory of 1984 N/A C:\Users\Admin\AppData\Local\Temp\35a124707d778d78543bf3bce873defdad0934144368a9c627bfea3583afbd9a.exe C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\xrjxeech.exe
PID 1376 wrote to memory of 1984 N/A C:\Users\Admin\AppData\Local\Temp\35a124707d778d78543bf3bce873defdad0934144368a9c627bfea3583afbd9a.exe C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\xrjxeech.exe
PID 1376 wrote to memory of 1984 N/A C:\Users\Admin\AppData\Local\Temp\35a124707d778d78543bf3bce873defdad0934144368a9c627bfea3583afbd9a.exe C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\xrjxeech.exe

Processes

C:\Users\Admin\AppData\Local\Temp\35a124707d778d78543bf3bce873defdad0934144368a9c627bfea3583afbd9a.exe

"C:\Users\Admin\AppData\Local\Temp\35a124707d778d78543bf3bce873defdad0934144368a9c627bfea3583afbd9a.exe"

C:\Windows\SysWOW64\cmd.exe

cmd.exe /c C:\Users\Admin\AppData\Local\Temp\

C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\xrjxeech.exe

"C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\xrjxeech.exe"

Network

N/A

Files

memory/1376-56-0x0000000075361000-0x0000000075363000-memory.dmp

memory/1760-57-0x0000000000000000-mapping.dmp

memory/1376-58-0x0000000004111000-0x0000000004FBD000-memory.dmp

\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\xrjxeech.exe

MD5 62dd3acc62df21dd48cb8a50222b5603
SHA1 27f9ca1e1537d58daa899a0ddd44b1f216d80384
SHA256 35a124707d778d78543bf3bce873defdad0934144368a9c627bfea3583afbd9a
SHA512 9f3404f25c18af16f65183faf393ce9809db41f19a3705a54abcbc79cd604cd101ec344c3715279ecfd1b3d9890263ff0fc65710644d7aded81070345d06c627

memory/1984-61-0x0000000000000000-mapping.dmp

C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\xrjxeech.exe

MD5 62dd3acc62df21dd48cb8a50222b5603
SHA1 27f9ca1e1537d58daa899a0ddd44b1f216d80384
SHA256 35a124707d778d78543bf3bce873defdad0934144368a9c627bfea3583afbd9a
SHA512 9f3404f25c18af16f65183faf393ce9809db41f19a3705a54abcbc79cd604cd101ec344c3715279ecfd1b3d9890263ff0fc65710644d7aded81070345d06c627

\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\xrjxeech.exe

MD5 62dd3acc62df21dd48cb8a50222b5603
SHA1 27f9ca1e1537d58daa899a0ddd44b1f216d80384
SHA256 35a124707d778d78543bf3bce873defdad0934144368a9c627bfea3583afbd9a
SHA512 9f3404f25c18af16f65183faf393ce9809db41f19a3705a54abcbc79cd604cd101ec344c3715279ecfd1b3d9890263ff0fc65710644d7aded81070345d06c627

memory/1984-66-0x0000000004161000-0x000000000500D000-memory.dmp

C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\xrjxeech.exe

MD5 62dd3acc62df21dd48cb8a50222b5603
SHA1 27f9ca1e1537d58daa899a0ddd44b1f216d80384
SHA256 35a124707d778d78543bf3bce873defdad0934144368a9c627bfea3583afbd9a
SHA512 9f3404f25c18af16f65183faf393ce9809db41f19a3705a54abcbc79cd604cd101ec344c3715279ecfd1b3d9890263ff0fc65710644d7aded81070345d06c627

Analysis: behavioral2

Detonation Overview

Submitted

2022-06-26 23:34

Reported

2022-06-26 23:40

Platform

win10v2004-20220414-en

Max time kernel

149s

Max time network

152s

Command Line

"C:\Users\Admin\AppData\Local\Temp\35a124707d778d78543bf3bce873defdad0934144368a9c627bfea3583afbd9a.exe"

Signatures

Kutaki

stealer keylogger kutaki

Kutaki Executable

Description Indicator Process Target
N/A N/A N/A N/A
N/A N/A N/A N/A

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fqxafxch.exe N/A

Drops startup file

Description Indicator Process Target
File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fqxafxch.exe C:\Users\Admin\AppData\Local\Temp\35a124707d778d78543bf3bce873defdad0934144368a9c627bfea3583afbd9a.exe N/A
File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fqxafxch.exe C:\Users\Admin\AppData\Local\Temp\35a124707d778d78543bf3bce873defdad0934144368a9c627bfea3583afbd9a.exe N/A

Maps connected drives based on registry

Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fqxafxch.exe N/A
Key value queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\disk\Enum\0 C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fqxafxch.exe N/A

Enumerates physical storage devices

Processes

C:\Users\Admin\AppData\Local\Temp\35a124707d778d78543bf3bce873defdad0934144368a9c627bfea3583afbd9a.exe

"C:\Users\Admin\AppData\Local\Temp\35a124707d778d78543bf3bce873defdad0934144368a9c627bfea3583afbd9a.exe"

C:\Windows\SysWOW64\cmd.exe

cmd.exe /c C:\Users\Admin\AppData\Local\Temp\

C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fqxafxch.exe

"C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fqxafxch.exe"

Network

Country Destination Domain Proto
US 93.184.220.29:80 tcp
US 93.184.220.29:80 tcp
US 209.197.3.8:80 tcp
NL 104.110.191.140:80 tcp
NL 104.110.191.140:80 tcp
US 8.8.8.8:53 97.97.242.52.in-addr.arpa udp
NL 88.221.144.179:80 tcp

Files

memory/2992-132-0x0000000000000000-mapping.dmp

memory/4276-133-0x0000000000000000-mapping.dmp

C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fqxafxch.exe

MD5 62dd3acc62df21dd48cb8a50222b5603
SHA1 27f9ca1e1537d58daa899a0ddd44b1f216d80384
SHA256 35a124707d778d78543bf3bce873defdad0934144368a9c627bfea3583afbd9a
SHA512 9f3404f25c18af16f65183faf393ce9809db41f19a3705a54abcbc79cd604cd101ec344c3715279ecfd1b3d9890263ff0fc65710644d7aded81070345d06c627

C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fqxafxch.exe

MD5 62dd3acc62df21dd48cb8a50222b5603
SHA1 27f9ca1e1537d58daa899a0ddd44b1f216d80384
SHA256 35a124707d778d78543bf3bce873defdad0934144368a9c627bfea3583afbd9a
SHA512 9f3404f25c18af16f65183faf393ce9809db41f19a3705a54abcbc79cd604cd101ec344c3715279ecfd1b3d9890263ff0fc65710644d7aded81070345d06c627